In 1985, Kubota signed with Sony Japan and began producing and writing songs for many of label's singers and groups.
Under the label, Kubota released his first single, "Shitsui no Downtown" in June 1986, followed by "Time Shower ni Utarete" in December.
Both songs were well received by radio, placing fifty-three and thirty-five on the Oricon Singles Chart.
[2] The following year in 1987, Kubota's second studio album, Groovin', debuted at number thirty-three and was certified million.
[1][2] Following the next three years, Kubota released "Kubojah: Parallel World I", "Neptune", and "The Baddest II".
In 1994, he relocated to New York in the United States of America and began working on upcoming album.
The album spawned the top-five hit "Yoru ni Dakarete (A Night in Afro Blue)".
In September 1995, Kubota released an English version of Bumpin' Voyage, which was titled Sunshine, Moonlight, his eighth album.